Spinning machine having yarn carriers retained in pairs on a revolver

Abstract

A spinning machine for ring, hopper or cap spinning with a revolver, yarn carriers retained in pairs on the revolver, and a ring traveler, hopper or cap system with a spinning ring, hopper or cap for the yarn carriers. One yarn carrier of a pair of yarn carriers having a finished cop in a spinning position is released from a ring traveler, hopper or cap system after the end of a spinning cycle. The finished cop is rotated through 180° about the axis of the revolver for moving the one yarn carrier of the pair of yarn carriers to a doffing position while moving the other yarn carrier of the pair of yarn carriers to the spinning position and spinning yarn onto the other yarn carrier. The ring traveler, hopper or cap system is mounted on the other yarn carrier once the spinning position is reached. Yarn travel from the one yarn carrier in the doffing position to the spinning ring, hopper or cap is maintained. The yarn in the vicinity of the bottom end of the yarn carrier is moved approximately radially toward the axis of the yarn carrier into an approach position. The yarn is grasped in the approach position with the yarn carrier being set into rotation. The yarn is carried along about the yarn carrier for piecing.

We claim: 
     
       1. Spinning machine, comprising a spindle rail, a plurality of revolvers having pivot axes about which said revolvers are rotatably supported on said spindle rail, spindles being retained in a spindle pair and movable from a spinning position into a doffing position on each respective revolver, said spindles of each of said pairs having peripheries, bases and axes and being mutually spaced apart defining a space therebetween, a ring traveler, hopper or cap system being movable back and forth along the direction of the axis of one of said spindles disposed in said spinning position, yarn transfer devices supported on said ring traveler, hopper or cap system and each being disposed in a respective one of said spaces for taking up a yarn from a spindle having been moved into said doffing position and delivering the yarn approximately radially toward the vicinity of the base of said spindle disposed in said spinning position, and entraining devices each being rotationally coupled to a respective one of said spindles and disposed on a respective one of said spindle bases for grasphing a yarn delivered to said spindle by said transfer device and entraining the yarn on the periphery of said spindle upon rotation of said spindle. 
     
     
       2. Spinning machine according to claim 1, wherein said ring traveler, hopper or cap system is a ring traveler system and said ring traveler system has a ring rail on which a respective one of said transfer devices is supported. 
     
     
       3. Spinning machine according to claim 2, wherein each of said transfer devices has a lever pivotably supported in a respective one of said ring rails, said lever having a free forked end with a path of motion in a plane extending between the spindle axes of one of said pairs of spindles. 
     
     
       4. Spinning machine according to claim 3, wherein said forked end has a surface with a channel-like recess formed therein. 
     
     
       5. Spinning machine according to claim 3, wherein said forked end has a base with a surface having a channel-like recess formed therein. 
     
     
       6. Spinning machine according to claim 2, wherein each of said transfer devices has a rotatably supported disk having an effective disk periphery being subdivided into at least two curve sectors. 
     
     
       7. Spinning machine according to claim 1, including yarn severing means each being associated with a respective pair of spindles, said severing means being operative in a region between said spindles located in said spinning position and in said doffing position. 
     
     
       8. Spinning machine according to claim 1, wherein each of said entraining devices has at least one catching claw being approximately tangentially opened with respect to the pivot axis of a respective one of said revolvers. 
     
     
       9. Spinning machine according to claim 1, wherein said base of each spindle has a bore formed therein with an axis extending transversely to the spindle axis, a piston having a center of gravity disposed on one side of said spindle axis and being axially guided in said bore, and means for resiliently pre-stressing said piston into a radially inward position, each of said entraining devices has at least one yarn catcher protruding outward from the periphery of said spindle base on a side of said spindle opposite the center of gravity of said piston whenever said piston is in said radially inward position, and said yarn catcher is at least partly retractable into said spindle base by said piston. 
     
     
       10. Spinning machine according to claim 9, including a piston rod being coupled with said piston for motion, said yarn catcher being disposed on said piston rod. 
     
     
       11. Spinning machine according to claim 10, wherein said piston rod is guided in a radial opening being formed in said spindle and opening into said bore receiving said piston. 
     
     
       12. Spinning machine according to claim 9, wherein said resilient pre-stressing means are in the form of a spring with a given spring force, said piston has a mass and a spacing between the center of gravity of said piston and the spindle axis being adapted to said given spring force, for radially displacing said piston and said yarn catcher by forces of inertia counter to said given spring force and radially pulling the yarn with said yarn catcher into said spindle base when a given spindle revolution speed is attained. 
     
     
       13. Spinning machine according to claim 1, wherein each of said entraining devices has a catching and clamping disk being joined to said spindle base, fixed against rotation relative to said spindle base and protruding outward beyond the periphery of said spindle for entraining the yarn. 
     
     
       14. Spinning machine, comprising a spindle rail, a plurality of revolvers for mounting spindles rotatably supported on said spindle rail, spindles being retained in a spindle pair and movable from a spinning position into a doffing position on each respective revolver, a ring traveler, hopper or cap system being movable back and forth along one of said spindles disposed in said spinning position, yarn transfer devices for taking up a yarn from a spindle having been moved into said doffing position and delivering the yarn toward said spindle disposed in said spinning position, and entraining devices each being rotationally coupled to a respective one of said spindles for grasping a yarn delivered to said spindle by said transfer device and entraining the yarn on said spindle upon rotation of said spindle.